Atomizer



June 16, 1925. 1,541,946

B. s. HARRISON ATOMIZER Filed May 15, 1922 2 Sheets-Sheet. 1

v; Ira/622507 June 16, 1925.

B. S. HARRISON ATOMIZER 1922 2 Sheets-Sheet 2 Filed May 15 O L PUMP Patented June 16,1925. UNITED STATES PATENT OFFICE.

BURT S. HARRISON, OF CHICAGO, ILLINOIS, ASSIGNOR T DRYING SYSTEMS, INC, OF CHICAGO, ILLINOIS, A,CORPORATION OF ILLINOIS.

ATOMIZER.

Application filed May 15, 1922. Serial No. 561,238.

To all wlmm it may concern: Figure is an end view of the stat ionar Be it known that I, BURT S. I'IARRISON. disk of the burner indicated on the line a citizen of the United States of America. 55 of Figure 3. and a resident of Chicago, county of ook, In its general features. the invention as 5 and State of lllinoisphave invented a new illustrated comprises a pair of coaxial disks and useful Improvement in Atomizers, of spaced apart slightly and one of which disks which the following is a specification. is dished on its inner surface so that the This invention relates to means for attwo together form an annular radially exomizing liquid or semi-liquids, useful for tending nozzle. One of these disks is to numerous purposes such as in spray dryers rapidly rotated while the oil is delivered to 65 but is herein described particularly as an the nozzle along the shaft supporting the oil burner. rotating disk. The outlet edge of one of With most types of oil burners only the disks is sharpened around the inner enough air is handled through the. burner edge of its periphery. By the pressure on to atomizc the oil. The balance of air necesthe oil, through the rotation of one oii the ,70 sary for good combustion is siphoned in as disks, the oil is thrown outwardly ;in a secondary air by the injector action of the more or less tangential direction by centlanie in the iltt'iltllZGl'. The result is that trit'ugal force. A rapidly moving surthe volume of air handled is variable derounding envelope of air travels transverse- 1Z0 pending upon the stack draft, the initial ly to the throw of the liquid. The latter air pressure, the size of the. secondary air is not only finely atomized but thoroughly opening. and other conditions which inter mixed with the air difl'used through it and t'erc with the fixed and certain operation is delivered in a helical stream in the form of the burner. It, also the case in most of a diverging cone, thisbeing found very air and the partially atomized fuel in the' the liquid is delivered from between a retiring chamber is imperfect. resulting in volving and a stationary disk. there is a imperfect-comlmstion. for unless the thorgrinding or rubbing action tendingt'o thorough mixing and ditt usi'on of the oil mist: oughly atomize the oil and keep the burner with the air is accomplisl'ied before combus-- clean. the outlet never becoming clogged 85 tion. the partial'burning of the oil particles or carbonized. The complete surrounding surrounds them with the products of comof the burner with an air current prevents bustion and preveuts their complete comany dripping of oiland byplacing the atom-' bustion. izer in the center of the blower outlet all It is thc objcct ot' the present invention the air for combustion passes through the 90 to make more certain and efficient the opburner and its quantity and speed are c:|- eration of an atomizer of this general class pable of regulation. The roaring noise of and to overcome the objections to the unmost burners. being due to the high pressure reliable action of prior types of burners. required of the air and oil in order to siphon 40 it is also an object of the invention to in the secondary air. is hereby avoided since 95 produce a practically noiseless oil burner. all of the air is delivered under pressure The objects of the invention are accomin large volume at comparatively low velocplished by the device shown in the accomity. panying drawings, wherein, The regulation of the quantity of oil de- Figure l is a longitudinal sectional view livered is affected by varying the space be- 100 of an oil burner and air blower constructed tween the two disks of the nozzle and the in accordance with this invention. resulting increase, in the pressure of the oil Figure 2 is a plan view illustrating the between the burner and the pump affects the general arrangement of the burner, blower. operation of a relief valve in the oil pump motors. oil pump. relief valve, and piping. line, permitting more of the oil pumped 1 Figure 3 is an enlarged longitudinal secto bypass back into the pump suction line. tional view of the burner nozzle. I The air blower speed is controlled by its Figure 4 is an enlarged longitudinal secvariable speed driving motor and the air tional detail showing one ofthe bearings is delivered through an adjustable nozzle for the rotatable burner shaft. surrounding the oil nozzle. Thus the burners that the mixture of the secondary efl'ective for the intended purpose. Since 30 volume of air delivered depends upon the static pressure on the air and the free area opening of the nozzle. 7

Referring tothe drawings, 1 indicates a rapidly rotating shaft pre erably having a direct connection to a motor 2 at its rear end. At its forward end this shaft carries a disk 3 betweerrwhich and a stationary disk 4 is an annular nozzle shaped. outlet 5 for the oil. The oil is conducted to the nozzle from the oil pump 6 through the conduit 7 pressure relief valve 8. conduit 9, and longitudinal grooves 10 in the shaft 1. The oil pump is shown drivenby a gear connection 11 with shaft 1. The oil relief valve serves to maintain any desired pressure on the oil by diverting, at a predetermined pressure, some of the oil through the bypass 12 to the pump feed pipe 13.

The adjustment of the nozzle space between the disks 3 and 4 is eti'ectedby means of a hexagonal nut 14 rigid with-a bushing 15 threaded into a bearing 16 for the shaft 1. This bushing carries a sleeve or tube 17 surrounding shaft 1 and slidable in the bearing 18, the dished disk 4 is fast to the end of sleeve 17.

The blower 19 is of the peripheral discharge type having at its bottom a discharge opening 20 concentric with and surrounding sleeve 17 and shaft 1. sleeve 21 is bolted to the blower outlet and is threaded at its end 22 to receive the ad-.

justable nozzle 23 surrounding the oil directing disks 3 and, 4. The fan 24 of the blower is rigid on the shaft 25 of the variable speed motor 26. I K

In the operation of the device, the blower is driven at a speed'corresponding with the maximum volume and pressure required of the air to carry the atomized liquid as thrown from the revolving disk 3 on the shaft 1. The volume of air delivered depends upon the static pressure of the air and the adjustment of the air outlet nozzle 23 with respect to the oil outlet nozzle which it surrounds. \Vhen the nozzle 23 is screwed back upon the nozzle sleeve so that its forward end is in line with the revolving shaft disk 3, the free area will be a minimum while when the nozzle is screwed forward on the nozzle sleeve so that the revolving shaft disk is back of the diverging nozzle, the free opening will be a maximum. By varying the speed of the blower and at the same time the speed of the nozzle, any proportion of the air volume between the maximum and the minimum may be obtained.

A nozzle this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted Without departing from the spirit of this invention as defined by the following claims.

I claim:

1. A device of the class described comprising a pair of coaxial spaced disks, means for rotating one of said disks, means for delivering a liquid to the space between'said disks,"means for regulating the flow of such liquid by a provision for adjusting one of said disks toward and away from the other, a means for deliveringair under pressure past theperiphery of said disks, said means including a nozzle converging toward said disks whereby the air and atomized liquid are directed to. a focal point outward of and in line with the axis of the disks.

2. A device of the class described comprising a pair of coaxial spaced disks, means for rotating one of said disks, means for delivering a liquid to the space between said disks, means for regulating the flow of such liquid by a provision for adjusting one of said disks toward and away from the other, a tapered nozzle enclosing said disks and adjustable longitudinally for varying the space between the peripheries of said disks and the walls of the nozzle, and means for delivering air under pressure to said nozzle.

An atomizer of the class described comprising a pair of closely spaced disks, means for rotating one of said disks, means for delivering a liquid to the space between said disks whereby it will be atomized by a relative moti'o-nbetween the disks and thrown outwardly by centrifugal action, means for causing air to travel past said disks in an axial direction, and an adjustable nozzle surrounding said disks for controlling the flow of air.

4. A device of the class described comprising a pair of coaxial minutely spaced apart disks, means for producing a relative rotation between said disks, means for delivering a liquid under pressure to the space between said disks, a nozzle spaced from and surrounding said disks and adjustable axially with respect to the disks. and means for delivering air under pressure to said nozzle.

Signed at Chicago this 12th day of May 1922.

BUR-T S. HARRISON. 

